This may be a reach, but I was trying to think of another coach that inherited a very talented team at a top tier school; and then look at their first season record. The best I come up with is Kirby Smart at Georgia. Richt could never climb the mountain, but was a very successful recruiter. His teams regularly won 10 or more games a season. In Kirby's first year (without having had 26 players flee in the portal) he went 8-5 (including losses to Vandy and Georgia Tech). The next season he went 13-2 (his only losses were to Auburn in the regular season and Us in the SEC Championship). Again, this occurred before the current NIL/Transfer landscape. DeBoer will be fine!